請幫我查看此bmi計算的結果到兩位小數。更改爲小數點後兩位
這裏是我的代碼...
@Override
public void onClick(View v) {
double weight;
double height;
double bmi;
String msg = "";
if (field_height.getText().toString().equals("") || field_weight.getText().toString().equals("")){
Toast.makeText(getApplicationContext(), "No Valid Values!", Toast.LENGTH_LONG);
}else {
weight = Double.parseDouble(field_weight.getText().toString());
height = Double.parseDouble(field_height.getText().toString());
bmi = height * height;
bmi = (weight/bmi);
}
}
這將有助於'String result = String.format(「%。2f」,bmi);' –